Subtract 18/90 from 15/5
1st number: 3 0/5, 2nd number: 18/90
15/5 - 18/90 is 14/5.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 90 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 5 × 18 = 90,
15/5 = 15 × 18/5 × 18 = 270/90 - Likewise, for the 2nd fraction, since 90 × 1 = 90,
18/90 = 18 × 1/90 × 1 = 18/90 - Subtract the two like fractions:
270/90 - 18/90 = 270 - 18/90 = 252/90 - After reducing the fraction, the answer is 14/5
- In mixed form: 24/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/5-18/90 15/5-36/90 15/10-18/90 45/5-18/90 15/5-54/90 75/5-18/90 15/25-18/90 15/35-18/90